Windshield wiper arm



- June 10, 1941. M, ZAIGER wINDsHIELD wIPER ARM Fil'ed Aug. l, 1940 atenied June i0, 1941 WSELD Max Zeiger, Swampscott, Mass. Application August l, 19st, Serial No. 349,139

' s claims. (ci. iis-250i This invention relates to windshield wiper arms, a fork IS hinged to the pivot I3 at its inner end. and pertains more particularly to improvements The sleeve I5 is adapted to receive a knurled in adjustable arms for like.

Because ofthe varying size of automobile windshields and the varying location of the-rocker or operating shaft of the wiper motor, wiper arms are normally manufactured in graded lengths and it is frequently necessary to bend or denect the free end of the arm in order that the wiper blade carried thereby will oscillate over the particular area which should be cleaned for best vision of the driver. Although longitudinally adjustable wiper arms have heretofore been provided, as shown for example in my Patent Number 2,087,178, such adjustable arms have not been universally accepted, because they have not eeen designed to best suit modern conditions and also because the telescoping rods or bars thereof cannot be bent to give the desired angular relationship of the blade, without -impairing the slidability of the bar.

It is, therefore,

windshield wipers or the the principal purpose of the collar il which lits upon and is pinned to the end of the oscillating rock shaft I8 of the wiper motor (not shown); and it will be evident that the collar I'I may be made with bores of various sizes to fit rock shafts of varying diameter. The sleeve I5 is secured to the collar by tightening the screw I9. A cover 20, hinged to the pivot I3, ts over and normally conceals the link Il and its associated parts and protects them from the weather, but may be tilted outwardly on its pivot, as shuwnin Fig. 1, to aiord easy access to the fastening elements.

The bottom edges of thel channeled bar I2 are provided with a series of longitudinally spaced notches 2i arranged in channeled sleeve II is pro perposed spring members 22 and 2S, the outer end 2@ of spring 22 extending beyond the outer end of spring 23 and being provided with a hook or paWl l25 selectively engageable in the respective pairs of notches 2l to hold the telescoping ratchet bar vided with a pair of supresent invention to improve the construction 1' in adjusted position longitudinally of the sleeve. and operation of the longitudinally adjustable 25 The inner ends of the springs 22 and 23 extend arms: and also to provide the telescoping bar into operative relationship with a pressure roller thereof with a pivoted tip or terminal which may 2B pivoted between the forked ends i6 of the easilybe adjusted to the desired angular relalink I4, the axis of the roller being oiiset from tionship'with respect to vthe sleeve portion of the the pivot i3 so that the roller exerts substantial arm, thereby permitting the wiper blade to be 3g pressure on the rear end of the spring 22 and properly positioned with respect to the surface to lying end 0f Spring 23, as indicated oe cleaned, without disturbing the arm itself.

Further objects reside in the structural features si the recommended embodiments of the invention illustrated in the' accompanying drawing, which ensure easy adjustabiliiy of the blade-attaching tip or t inal of the arm, both longitudinally and angularlythereof. and which thus contribute -to eiective location of the blade on of a windshield.

The two springs are held in effective relation `to the sleeve il and the slidable bar I2 by a. series of straps 21, 28, and 29, formed integral with the sides of the sleeve II and engaging under the spring; and cooperating elements are the windshield.v 40 formed on the two springs to prevent relative In the drawing: longitudinal movement therebetween. As best Fig. l is a side elevation, partly in section, of shown in Fig. 3, each spring is provided with a the improved Wiper arm: i Y pair of downwardly strucktongues 3B and 3l,

Fig. 2 is a bottom view of the arm vshown in respectively, the tongues 36 being heldin position Fig. l equipped with a modied form of abladefjr-- between the straps 2B and 29, and the tongues 3l connecting member or terminal;

Fig. 3 is a fragmentary longitudinal section, to`

larger scale, of the arm shown in Fig. 1; s springs are interlocked and restrained from 1on- Fig. e is a view similar to Fig. 3 showing the xgitudinal movement relative toeach other or relaterminal end portion of the arm illustrated inV tive to the sleeve ii; and they are retained inl Fig. 2: and 'operative relation to lthe pressure roller 2B and E11Fig. 5 is a transverse section on line of yto Vthe notched edges or ratchet of the slidable Vfefliar I2.

The improved wiper arm neled sleeve Il and a channeledbar it slld'eble 5 longitudinally of the sleeve Ii and adapted to be d position as hereinafter explained,

held in adjuste the sleeve being pivoted at i3 to a link member of metal doubledupon It consisting of a strip itself to provide a sleeve l5 at its outer end and o striking out the tongues comprises 'a lchanlentering thespaces formed in the spring 23 by 30. Thus, the two '.Itk is thus apparent that the bar I2 is held in adjusted position by the pawi 25 at the outer vend of the spring will yield downwardly when the bar is pushed inwardly or pulled outwardly tomove it to a new adjusted position. Outward movement of the o bar with respect to the sleevev is limited by stop opposite pairs; and the- 22. but that said outer end members comprising an inwardly bent lug 32 at the inner end of the bar I2, and a tongue 33 struck upwardly from the spring member 22 into the path of movement of the bar end 32.

terminal to be moved readily from side to side with respect to the bar l2; but the tip is rmly held in adjusted position I claim: 1. A wiper arm of the character described, comprising a bar, a terminal connectable to a tively to hold the parts in predetermined angular relationship.

3. A wiper arm comprising a long apertures positively to hold the parts in termined angular relationship.

A Wiper arm of the character described, comprising a minal having registering openings remote `from the pivot, and positioning means extending through said openings for releasably locking the parts in adjusted angular relationship.

MAX ZAIGER. 

